<template>
    <div class="goodsinfo-container">
        <!-- 商品轮播图 -->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <swiper :swipeList="swipeList" :isfull="false"></swiper>
                </div>
            </div>
        </div>

        <transition
            @before-enter="beforeEnter"
            @enter="enter"
            @after-enter="afterEnter">
            <div class="ball" v-show="ballFlag" ref="ball"></div>
        </transition>

        <!--  -->
        <div class="mui-card">
            <div class="mui-card-header">{{goodsinfo.title}}</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p class="price">
                        市场价：<del>￥{{goodsinfo.market_price}}</del>&nbsp;&nbsp;销售价：<span class="now_price">￥{{goodsinfo.sell_price}}</span>
                    </p>
                    <p>购买数量:&nbsp;<numbox @getCount="getSelectedCount" :max="goodsinfo.stock_quantity"></numbox></p>
                    <mt-button type="primary" size="small">立即购买</mt-button>
                    <mt-button type="danger" size="small" @click="addGoodsToCar">添加到购物车</mt-button>
                </div>
            </div>
        </div>

        <div class="mui-card">
            <div class="mui-card-header">商品参数</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p>商品货号：{{goodsinfo.goods_no}}</p>
                    <p>库存情况：{{goodsinfo.stock_quantity}}件</p>
                    <p>上架时间：{{goodsinfo.add_time}}</p>
                </div>
            </div>
            <div class="mui-card-footer">
                <mt-button type="primary" size="large" plain @click="goDesc(id)">图文介绍</mt-button>
                <mt-button type="danger" size="large" plain @click="goComment(id)">商品评论</mt-button>
            </div>
        </div>
    </div>
</template>

<script>
import swiper from '../subcomponents/swiper.vue'
import numbox from '../subcomponents/goodsinfo_numbox.vue'

export default {
    data() {
        return {
            id: this.$route.params.id,
            swipeList: [],
            goodsinfo: {},
            ballFlag: false,
            selectedCount: 1 // 选中的商品数量
        }
    },
    created() {
        this.getSwipeList()
        this.getGoodsInfo()
    },
    methods: {
        getSwipeList() {
            this.$http.get('api/getthumimages/' + this.id).then(result => {
                if (result.body.status === 0) {
                    result.body.message.forEach(item => {
                        item.img = item.src
                    })
                    this.swipeList = result.body.message
                    console.log(this.swipeList);
                }
            })
        },
        getGoodsInfo() {
            this.$http.get('api/goods/getinfo/' + this.id).then(result => {
                if (result.body.status === 0) {
                    this.goodsinfo = result.body.message[0]
                } 
            })
        },
        goComment(id) {
            this.$router.push({name: 'goodscomment', params: {id}})
        },
        goDesc(id) {
            this.$router.push({name: 'goodsdesc', params: {id}})
        },
        addGoodsToCar() {
            this.ballFlag = !this.ballFlag;
        },
        beforeEnter(el) {
            el.style.transform = "translate(0, 0)"
        },
        enter(el, done) {
            el.offsetWidth

            // 获取 DOM 元素
            const ballPos = this.$refs.ball.getBoundingClientRect()
            const badgePos = document.getElementById('badge').getBoundingClientRect()

            const xDist = badgePos.left - ballPos.left
            const yDist = badgePos.top - ballPos.top


            el.style.transform = `translate(${xDist}px, ${yDist}px)`
            el.style.transition = "all 1s cubic-bezier(.31,-0.5,1,.56)";

            done() 
        },
        afterEnter(el) {
            this.ballFlag = !this.ballFlag;
        },
        getSelectedCount(count) {
            this.selectedCount = count
            console.log(this.selectedCount);
        }
    },
    components: {
        swiper,
        numbox
    }
}
</script>

<style lang="scss" scoped>
    .goodsinfo-container {
        background-color: #eee;
        // overflow：当内容溢出元素框时的处理方法
        // hidden：内容会被剪裁，且其余内容不可见
        overflow: hidden;

        .now_price {
            color: red;
            font-size: 16px;
            font-weight: bold;
        }

        .goodsinfo_container {
            display: inline-block;
        }

        .mui-card-footer {
            display: block;

            button {
                margin: 10px 0;
            }
        }

        .ball {
            width: 15px;
            height: 15px;
            background-color: red;
            border-radius: 50%;
            z-index: 99;
            position: absolute;
            top: 390px;
            left: 141px;
        }
    }
</style>